LG Electronics AMNH123DEA0 (LMN120HE) Air Conditioner User Manual


 
Service Manual 47
Operation
Function of Outdoor Unit
Outdoor Unit
Two Comp algorithm
Operating Step
LEV Control
Out door Fan Control
Compressor step varies considering condition such as room temp,outdoor temp, operating room
number,Temp gap between room temp and set temp and so on.
LEV pulse is modulated to keep constant superheat or subcooling.
Outdoor fan operates at High or Off to respond to the load condition.
R/Valve Control(Heating Model Only)
Convert R/Valve to change cooling to heating, heating to cooling.
Defrost Function
After 45 min heating operation, check the defrost condition and if outdoor pipe temp is below -
5°C(23°F) and released from deice operation in case outdoor pipe temp is over 12°C(53.6°F) or 9 min
cooing mode.
To deice outdoor heat exchanger in low temp condtion, convert operating mode from heating to
Oil Return System
In single(one) comp operation duration, another comp will operate for 30 seconds every 1 hours.
Comp Overload Protection
To protect comp from being overload, protector will turn off the comp.
High Pressure Protction
If cycle pressure is too high(around 36.7 kgf/cm
2
), it will turn off comp A
Inverter Comp is first priority and then Constant Comp is turning on responding to load condtion.